Goodbye Mommy, Goodbye Daddy

Hello Mom and Dad.  Starting just recently Alyce is making a transition from calling Mom and I Mommy and Daddy and instead she is calling us Mom and Dad.  We're not sure where she picked up Mom and Dad or why she is saying it the new way but we don't like it.  Well we don't like it yet.  Our little girl is still 3 not 13 and we really enjoy hearing Mommy and Daddy on a daily basis.  Most likely she picked it up a school which is where she is picking up most any new behavior.